Personal Loan Calculator
Calculate repayments on a personal loan from NZ banks and lenders. Compare interest rates, loan terms, and total cost of borrowing.
About this calculator
This calculator uses NZ Consumer Protection borrowing guidance. Reference: Standard amortisation formula. Last consulted 20 March 2026.
Current NZ personal loan rates
Indicative — Q2 2026 market- •Unsecured personal (typical): 10–18% p.a.
- •Secured personal (vehicle, etc): 8–13% p.a.
- •Typical term: 1–7 years
- •Min loan amount: $1,000–$3,000
- •Max unsecured: $50,000 (most lenders)
- •Establishment fee: $0–$500
Disclaimer
This calculator provides estimates for general information purposes only. Results should not be relied upon as professional financial, tax, or legal advice. Tax rates and thresholds are based on publicly available IRD data and may change. Always consult a qualified tax agent or financial adviser for advice specific to your circumstances.
How personal loan repayments are calculated
Personal loans use the standard amortisation formula. NZ unsecured personal loan rates are 10-20% — much higher than mortgages because no collateral.
- 1
Calculate monthly payment (PMT)
PMT = P × i × (1+i)^n ÷ ((1+i)^n − 1)
P = principal, i = monthly rate, n = total months.
- 2
Total interest paid
Total_interest = (PMT × n) − P
Higher rate + shorter term = less total interest.
- 3
Effective annual cost
Annual_cost = PMT × 12
Compare against your annual income for affordability check.
Worked example
Inputs: $15,000 loan, 13% rate, 3 years
Result: Monthly $505. Total $18,176. Interest $3,176.
Frequently Asked Questions
What interest rates do NZ personal loans charge?
How does the loan term affect total interest paid?
What is a comparison rate?
Can I repay a personal loan early in NZ?
Personal loans in NZ are unsecured loans for any purpose. Interest rates are higher than home loans due to the lack of security. The CCCFA (Credit Contracts and Consumer Finance Act) requires lenders to conduct responsible lending checks.
How this calculator works
Same amortization formula as car loans: monthly payment = P × (r(1+r)^n) / ((1+r)^n − 1). Key cost comparison: total interest = (monthly payment × n) − principal.
NZ Personal Loan Rates & Terms (2025)
| Bank personal loan rate | 10–15% p.a. |
| Finance company rate | 15–30%+ p.a. |
| Typical repayment term | 1–7 years |
| CCCFA requirement | Lender must verify affordability |
| Early repayment | Some lenders charge break fees |
Always check the total cost of credit (TCOC) not just the monthly payment. Compare across lenders using the comparison rate.
Worked Examples
$10,000 personal loan at 12% p.a. over 3 years
Monthly payment $332, total interest $1,952.
- Principal: $10,000
- Monthly rate: 12% / 12 = 1.0%
- Months: 36
- Monthly payment = $10,000 × (0.01 × 1.01^36) / (1.01^36 - 1)
- 1.01^36 = 1.4308
- Monthly payment = $10,000 × 0.014308 / 0.4308 = $332
- Total repaid: $332 × 36 = $11,952
- Total interest: $11,952 - $10,000 = $1,952
$20,000 personal loan at 15% p.a. over 5 years
Monthly payment $476, total interest $8,560.
- Principal: $20,000
- Monthly rate: 15% / 12 = 1.25%
- Months: 60
- Monthly payment = $20,000 × (0.0125 × 1.0125^60) / (1.0125^60 - 1)
- 1.0125^60 = 2.1072
- Monthly payment = $20,000 × 0.026340 / 1.1072 = $476
- Total repaid: $476 × 60 = $28,560
- Total interest: $28,560 - $20,000 = $8,560
Built and maintained by Konstantin Iakovlev. Data sourced from the IRD and official New Zealand government sources.
Last reviewed: